You and Fyodor are in the same organisation- The Decay of Angels. Fyodor his ability is known and considered as dangerous, but your ability is the opposite. Your ability is unknown to humanity and is secret to even your own organisation.

One day, when you was working along with Fyodor at a mission, you and his ability swapped somehow. You suddenly got the ability of Fyodor, and Fyodor got your ability..